"Im a big K&N fan so picking one of these up for my 2011 Sonata Limited 2.0T was typical. After driving the car in stop/go traffic with the stock filter there is definitely some turbo lag present. The car is more than drivable its more of a small annoyance in really slow traffic. After installing the K&N there is definitely less turbo lag improving drivability. Only time will tell on gas mileage and power improvements..."posted by: Nizzo on October 12, 2013view all 2 reviews

"Bought the panel K&N filter for my new 2012 Sonata SE. It is the 2.4 engine. Since I have had many cars with K&N filters I have always seen a minor improvement or gain I could "feel" from all my previous experiences - like going up a steep hill by my house, etc.. Unfortunately with the Sonata, I could not feel a thing, no difference at all, also no measureable difference in fuel economy either. I guess the stock paper filter is pretty good.
Don't expect any performance or mileage gain. But you don't have to ever replace it and that is worth something."posted by: the truth on May 2, 2012view all 2 reviews